Turning Coffee Ground, Cardboard and Woodchips Into Muchrooms for Parishttps://phys.org/news/2019-02-parisians-coffee-fuelled-urban-mushroom-magic.html ... Urban agriculture is first and foremost about recycling organic waste from cities as a means of expanding the move towards a regenerative, 'circular economy' making more judicious use of finite resources."Thirty percent of urban waste is useful biowaste and today, only five percent of this organic matter is recycled," ... "We are just doing what they did in the 19th Century, but with modern methods,"
... Today, some
20 tonnes of coffee grounds are collected each month in and around Paris, the bulk from large firms' restaurants in the west of the city. From that can be produced around
two tonnes of oyster mushrooms.
At 15 euros ($17) per kilo that equates to a 30,000 euro 'harvest' and a campaign is under way to encourage more Parisian cafes to get in on the act.
"It's a virtuous undertaking—we are producing between 20 and 30 kilos of grounds a week," says Romain Vidal, 30 and the owner of Le Sully brasserie in Paris and a pioneer of the recycling technique.
Paris's deep-rooted cafe culture means there is no shortage of the stuff—
the city annually produces around 600,000 tonnes of grounds, according to UpCycle, which is helping manage similar projects in several other French towns.
After harvesting, the already recycled grounds embark upon their third lifespan, returning to the ground as compost—or 'champost', a play on words with champignon, French for mushroom—mixed in with mushroom strands and wood cellulose.-------------------------------------
Race On to Make Urban Agriculture Viable, Durablehttps://phys.org/news/2019-02-urban-agriculture-viable-durable.html----------------------------------
How Urban Agriculture Can Improve Food Security in US citieshttps://phys.org/news/2019-02-urban-agriculture-food-cities.htmlDuring the partial federal shutdown in December 2018 and January 2019, news reports showed furloughed government workers standing in line for donated meals. These images were reminders that for an estimated one out of eight Americans, food insecurity is a near-term risk.
In California 80 percent of the population lives in cities. Feeding the cities of the nine-county San Francisco Bay Area, with a total population of some 7 million involves importing 2.5 to 3 million tons of food per day over an average distance of 500 to 1,000 miles.
This system requires enormous amounts of energy and generates significant greenhouse gas emissions. It also is extremely vulnerable to large-scale disruptions, such as major earthquakes.
And the food it delivers fails to reach 1 of every 8 people in the region who live under the poverty line – mostly senior citizens, children and minorities. Access to quality food is limited both by poverty and the fact that on average, California's low-income communities have 32.7 percent fewer supermarkets than high-income areas within the same cities.
Urban farming has grown by more than 30 percent in the United States in the past 30 years. Although it has been estimated that urban agriculture can meet 15 to 20 percent of global food demand, it remains to be seen what level of food self-sufficiency it can realistically ensure for cities.--------------------------------
Tech Connection Boosts NY Vertical Farmershttps://phys.org/news/2019-02-tech-boosts-ny-vertical-farmers.htmlLaunched in 2015, Bowery is part of the fast-growing vertical farming movement, which employs technology in a controlled, man-made setting to grow fresh vegetables indoors all year long.
... But it can take a while for vertical farms to find solutions that are viable.
"The big, big vertical farms are having a difficult time being profitable because they are so capital-intensive at the beginning," said Henry Gordon-Smith, founder of Agritecture, a consultancy.
Scale is an issue and the concept will not be viable "
so long as the price of the vegetables is not increased fourfold,"
to cover energy costs, says Christol.
Large farms typically need seven or eight years before they are profitable, with smaller farms requiring perhaps half as long.